6621 - Supply of Electric Utility High Voltage Circuit Breakers, 3.Statement of Work/ SpecificationsIFB #6621
EXHIBIT 3
Technical Specifications
Supply of Electric Utility High Voltage Circuit Breakers
PURPOSE
The purpose of this technical specification is to provide information that will allow prospective suppliers to prepare submissions to supply completely assembled and tested Siemens SPS2
138kV circuit breakers for use in substations. The circuit breakers are to be priced FOB destination to the Spencer Utility Site, 1701C Spencer Road, in Denton, Texas or to other substation
sites in or near Denton as directed at the time of shipment. Freight shall be included in the price for each breaker.
DME has utilized Siemens’s circuit breakers in designs for substation projects; therefore, only proposals for the specified manufacturer will be accepted.
SERVICE CONDITIONS
Site Location: The service location for these transformers will be in substations in the Denton, Texas area.
Service Elevation: Approximately 640 feet above sea level.
Temperature: -20o F to 120o F.
Other Considerations: Moderately humid climate with 10 to 30 inches of rain per year; wind up to 90 mph; thunderstorms with severe lightning occurring in all months of the year with
the greatest frequency during the warmer months.
SUBMISSIONS
Submissions shall be provided using Exhibit 1. Additional information clarifying the supplier’s product may be attached to submission. Pricing shall include all costs to deliver goods
as specified in this specification. Any special fees or commissions, and all freight for delivery to the City of Denton must be included in the quoted price.
The respondent must be an approved distributor by the manufacturer of these products, and be authorized to sell the products to the City of Denton.
QUALITY CONTROL
The manufacturer shall be responsible for the quality control of the manufacturing processes to assure that all requirements of these specifications are met. However, the City reserves
the right to observe, to inspect and to require additional quality control investigations, either by its personnel or an independently employed quality control investigator, at any
or all stages of fabrication at the manufacturer’s facilities. Inspections, with or without comment, shall not relieve the supplier of the requirement for conformance to the specification
nor shall the inspections be construed as acceptance of work not in accordance with the intent of the specification. Failure to adequately maintain quality of fabrication until completion
shall be grounds for cancellation of the order or any part thereof.
Field failure or field repairs required due to quality control failures or manufacturing procedures shall be the responsibility of the manufacturer.
WRITTEN WARRANTY and GUARANTEES
Written guarantees shall include any limitations as to the nature of failure or time limitations. The guarantee shall begin upon receipt of the accepted units, not on the date of manufacture.
Guarantees shall indicate whether or not it is made on a full replacement basis or a prorated basis and if prorated then what are the terms. Manufacturer/supplier guarantees that
the goods furnished under this specification are of high quality and agrees to replace any goods found to be defective during inspection, installation, or service for a minimum period
of 60 months after unit is delivered to Denton.
All replacements by the manufacturer/supplier shall be free of charge F.O.B. destination at the same delivery point called for in the original order. Replacements must be handled in
a professional and timely manner and in no case shall a replacement unit take longer than 60 days to arrive in Denton after first being submitted for replacement.
Respondent guarantees that all products quoted and furnished under this agreement will be accepted at any normally used United States approved repair and warranty shop should one be
available for the manufacturer’s product quoted. The City of Denton will not accept a manufacturer’s product that was rejected or substandard and then sold to a broker for either resale
or scrap that would not be fully warranted by the original manufacturer.
The respondent also guarantees that the City will be represented by the Manufacturer, should an issue arise, and that all manufacturer’s warranties will be in effect for the life of
the contract.
SPECIAL DELIVERY REQUIREMENTS
Shipment by open flatbed truck: Circuit breakers purchased under this agreement shall be shipped FOB Destination by open flatbed truck fully assembled and ready for installation. The
owner will provide unloading and installation.
Delivery location: Switches shall be delivered to the Spencer Utility Site, 1701C Spencer Road, Denton, Texas, 76205 or to other DME substation sites as directed at the time of shipment.
Notice of factory shipments: The supplier shall provide notice when the products are shipped. The owner only has a forklift to unload the products. Contact Sam Bridges at (940) 390-6279
for notices of shipment. Secondary contact is Misty Willis at (940)-597-7912. Delivery of the products will be accepted only between the hours of 8:00 am and 3:00 pm Monday through
Friday, excluding holidays.
Damaged or defective material or equipment: Circuit breakers that are obviously damaged on arrival will be refused. Any necessary action regarding replacement of materials or equipment
delivered in unacceptable condition shall be the responsibility of
the supplier. This includes concealed freight damage as well as items originally defective from the manufacturer.
TECHNICAL RESPONSIBILITIES AND REQUIREMENTS
Detail Design: Detailed structural and electrical design is the responsibility of the supplier. All clearances and spacings must conform to ANSI standards, and the National Electrical
Safety Code, whichever is more stringent. Greater clearances shall apply where specified.
Omissions: It is the intent of this specification to require the supplier to provide complete and fully functional circuit breakers that are equipped and featured appropriately to perform
and operate as described herein. Further it is the intent of this specification to require that the circuit breakers be constructed, as a minimum, in accordance with all US standards
that apply to circuit breaker manufacture and testing. Omission of any minor details from this specification, minor mistakes or typographical errors in text, or mistakes in attempting
to reference standards or data in the standards shall not relieve the supplier from the responsibility to furnish complete and fully functional circuit breakers that comply with accepted
national standards and meet the intents communicated herein.
Shop Assembly and Preparation for Shipment: The circuit breakers shall be shipped completely assembled ready for mounting on foundations and installation of HV and control electrical
connections. Circuit breakers shall be fully tested at the facility of the supplier.
Delivery Schedule: The supplier shall submit a schedule with the proposal indicating the expected time (ARO) when approval drawings will be provided for each circuit breaker ordered
and the time (ARO) when the circuit breakers will be delivered, assuming one week return on approval drawings.
Drawing Identification: All drawings shall be identified with a unique drawing number, the date, the manufacturer’s shop order number, the owner’s name, purchase order number, and the
name of the substation where the circuit breaker will be installed.
Approval of Design: The owner shall have an opportunity to approve the design, features and accessories of circuit breakers for the first order. Subsequent orders of the same type
of circuit breakers will not require approval drawings, unless specifically stated on the purchase order.
Approval drawings shall contain sufficient information to confirm all data that was included in the proposal. The owner shall be furnished with an electronic set of approval drawings,
equipment descriptive information, and any appropriate comments or notations at or before the time stated in the proposal. The owner will return drawings marked "approved" or "revised
as noted". If changes are identified in the owner’s review, a revised drawing submittal may, at the owner’s option, be required to obtain final approval.
Review of drawings by the owner will be with respect to general design and functionality, but shall not be construed to relieve the supplier from any responsibility or
liability for proper design, fabrication, compliance with the specifications, compliance with standards, or for any errors that may have been contained in the shop drawings.
The approval drawings shall provide information in sufficient detail to describe equipment operation and function, dimensions, space needs for installation, and recommended clearances
for proper operation. The approval submittal shall include at least the following items:
Outline drawings with all parts identified by item number referenced to a list of material. These drawings shall show detailed dimensions, locations of all components and devices, recommended
clearances for proper operation and any special mounting requirements.
Operational drawings including control schematics and connection diagrams.
Nameplate data with associated information: The manufacturer’s name, model number, date of manufacture, serial number, voltage and amperage ratings (continuous and short circuit) for
each circuit breaker.
Descriptive literature and drawings for all accessories and optional items.
Final Drawings, Instruction Books, and test Reports: No later than the scheduled first shipment, the supplier shall furnish an electronic set of instruction books and final drawings
for each circuit breaker shipped. The set shall include at least the following:
An electronic set of final drawing in AutoCAD “dwg” format along with a list of all drawing titles and file names.
Operation instruction and descriptive literature
Maintenance instructions.
Parts list
Materials and Workmanship: Only new materials shall be used in fabrication of these circuit breakers. Damaged or defective materials shall not be repaired and used. No peening, caulking,
or filling shall be permitted in repairing cracks, pinholes, or other types of defects. Such defects in fabricated members shall be repaired by replacement.
DESIGN FEATURES
Circuit breakers shall conform to control schematics attached as exhibit 4.
Owner will make all 138kV bushing connections and all terminations for external connections to breaker control cabinet.
Circuit breakers shall be equipped and furnished as follows:
Control and operator power requirements:
Control supply voltage: 125VDC
Spring charge motor supply voltage: 120VAC/125VDC
Accessory supply voltage: 120VAC
Heater Supply Voltage: 240VAC
Fused knife switches (ACC / motor / heater circuits)
One close coil
Dual trip coils configured to receive trip signals from two independent sources.
Control switch
Local/remote selector switch
Loss of voltage relays (close and trip circuits)
Position indicator lights
Time delay relay
External manual trip device
Thermostatically (adjustable) controlled cabinet heaters
Auxiliary switches with 12a and 12b spare contacts for owner use
GFI outlet inside control cabinet
Wire markers on CT wiring
Breaker frame mounted temperature compensated density switch and gauge
Stainless steel nameplates according to IEEE/ANSI standards
14 AWG Type SIS control wiring (or larger)
10 AWG Type AMW-TEW CT wiring
4-500 MCM grounding terminals on frame
NEMA type 3R control cabinet painted ANSI 70 grey
NEMA 4 hole un-plated aluminum terminals
Galvanized frame and leg assemblies
Standard installation toolkit including SF6 fill gas
Gas Circuit Breaker: Siemens SPS2S-145-40-3000-3PST
138kV nominal voltage
40kA maximum symmetrical interrupting capability
3000A maximum continuous current
Capable of -30°C operation without tank heaters
131 inch creep porcelain bushings rated 650kV BIL @ 3300 feet ASL
3-cycle, 60Hz, spring-spring operated
Gang operation, frame mounted outdoor circuit breaker
Compact frame with reduced footprint
Frame mounted density switch
Bushing Current Transformers – 2 CT’s per bushing (total 12 BCT’s):
Bushings 1-3-5: (6) 2000:5 MR C800, 0.3B1.8 accuracy, RF 2.0
Bushings 2-4-6: (6) 2000:5 MR C800, 0.3B1.8 accuracy, RF 2.0
Gas Circuit Breaker: Siemens SPS2-145-63-3000-3PST
138kV nominal voltage
63kA maximum symmetrical interrupting capacity
3000A maximum continuous current
Capable of -30°C operation without tank heaters
131 inch creep porcelain bushings rated 650kV BIL @ 3300 feet ASL
3-cycle, 60Hz, spring-spring operated
Gang operation, Frame mounted outdoor circuit breaker
Bushing current transformers – 2 CT’s per bushing (total 12 BCT’s):
Bushing 1-3-5: (6) 2000:5 MR C800, 0.3B1.8 accuracy, RF 2.0
Bushing 2-4-6: (6) 2000:5 MR C800, 0.3B1.8 accuracy, RF 2.0
Spare Parts: The manufacturer shall provide a list and option pricing for recommended spare parts.
ACCEPTABLE MANUFACTURERS
DME will only accept submissions from specific manufacturers listed in the approved manufacturers list below.
SIEMENS